System Requirements Document for crystal-modern

1. Introduction

The "AI Walkie" project aims to develop a modern mobile application that functions as an AI-powered push-to-talk communication tool. The app is designed to replicate the real-time communication experience of traditional walkie-talkies, enhanced with artificial intelligence capabilities. The target audience includes individuals and groups seeking efficient, instant voice communication with added AI functionalities such as translation, summarization, and voice-to-text conversion.

2. System Overview

AI Walkie is a mobile application that provides real-time voice communication through voice channels, similar to a traditional walkie-talkie, but enhanced with AI features. The app supports user authentication, channel creation, AI voice assistance, voice translation, and an emergency mode. It is built using Flutter or React Native, WebRTC for voice communication, Node.js for the backend, and PostgreSQL or Supabase for data storage. The system ensures low latency and secure communication.

2a. Product Interpretation and Delivery Boundary

The application is designed to provide a real-time walkie-talkie experience, not a simple voice-message chat app. It includes a robust authentication system, channel management, and AI-powered features. The app's architecture separates voice communication from normal application data to maintain low latency. The initial MVP focuses on core functionalities with a structure that allows for future feature expansion. The app maintains secure communication and user data handling, with permissions managed appropriately.

2b. Source Content Inventory

Not applicable as no content source directive was provided.

2c. Page Content and Component Coverage

Landing

• Purpose: Introduce AI Walkie, its features, and benefits.
• Components:
  • Overview of AI Walkie
  • Explanation of real-time push-to-talk communication
  • Call-to-action for user registration or login

Login/Register

• Purpose: User authentication and account creation.
• Components:
  • Email, phone, Google, or Apple sign-up/login
  • Username and profile picture setup
  • Friend addition functionality

Splash Screen

• Purpose: Initial app loading screen.
• Components:
  • App logo and branding
  • Transition to Login/Register or Home

Home

• Purpose: Main navigation and channel entry point.
• Components:
  • List of available channels
  • Access to Friends, Notifications, and Settings

Walkie-Talkie Channel

• Purpose: Real-time voice communication.
• Components:
  • Channel name and current speaker display
  • Large HOLD TO TALK button
  • Online users and microphone status
  • Recent voice messages and AI button
  • Mute/Speaker button and channel settings

Channel Creation

• Purpose: Create new communication channels.
• Components:
  • Public or private channel options
  • Channel name and invite code setup

Channel Members

• Purpose: Manage channel participants.
• Components:
  • List of current members
  • Options to remove or mute members (admin only)

AI Assistant

• Purpose: Provide AI-powered voice assistance.
• Components:
  • Voice command input
  • Conversation summarization and translation
  • Voice-to-text conversion

Conversation History

• Purpose: Access past conversations and transcripts.
• Components:
  • List of recent conversations
  • Transcript display and copy option

Friends

• Purpose: Manage friend relationships.
• Components:
  • List of friends
  • Add or remove friends

Notifications

• Purpose: Display app notifications.
• Components:
  • List of recent notifications
  • Notification settings

Emergency

• Purpose: Send urgent alerts and share location.
• Components:
  • Large emergency button
  • Contact selection for alerts
  • Optional location sharing

Profile

• Purpose: Manage user profile details.
• Components:
  • Username and profile picture
  • Account settings

Settings

• Purpose: Configure app preferences.
• Components:
  • Audio and notification settings
  • Permissions management

3. Functional Requirements

• As a User, I should be able to sign up and log in using email, phone number, Google, or Apple to access the app. (explicit)
• As a User, I should be able to create a username and profile picture to personalize my account. (explicit)
• As a User, I should be able to add friends to communicate with them easily. (explicit)
• As a User, I should be able to hold a button to talk and release it to send a voice message with very low latency. (explicit)
• As a User, I should be able to see who is speaking and who is online in a channel. (explicit)
• As a Channel Administrator, I should be able to remove or mute members in my channel. (explicit)
• As a User, I should be able to use an AI assistant to understand commands, answer questions, summarize conversations, and translate languages. (explicit)
• As a User, I should be able to translate voice messages into different languages and hear them in natural-sounding speech. (explicit)
• As a User, I should be able to view and copy text transcripts of voice messages. (explicit)
• As a User, I should be able to send urgent alerts and share my location in an emergency. (explicit)
• As a User, I should experience a clean, modern interface with fast, responsive animations. (explicit)

4. User Personas

• User: Engages with authentication, profiles, friends, channels, push-to-talk communication, AI assistance, translation, transcripts, notifications, emergency alerts, and personal settings.
• Channel Administrator: Manages channel membership by removing or muting members and controls channel settings for channels they administer.

5. Core User Flows

User Authentication Flow

1. User opens the app and lands on the Splash Screen.
2. User proceeds to the Login/Register page.
3. User selects a sign-up or login method (email, phone, Google, Apple).
4. User completes authentication and is directed to the Home page.

Push-to-Talk Communication Flow

1. User navigates to the Walkie-Talkie Channel page.
2. User holds the HOLD TO TALK button to record a message.
3. User releases the button to send the message.
4. Other users in the channel hear the message immediately.

AI Assistant Interaction Flow

1. User accesses the AI Assistant page.
2. User speaks a command (e.g., "Translate this to Portuguese").
3. AI processes the command and provides a response.
4. User receives the translated or summarized output.

Emergency Alert Flow

1. User navigates to the Emergency page.
2. User presses the emergency button to send an alert.
3. Selected contacts receive the alert and optional location information.

6. Visuals Colors and Theme

• Muse: Virgil Abloh
• Palette:
  • Background: #141517
  • Surface: #1E1E1E
  • Text: #FFFFFF
  • Primary: #FF8800
  • Accent: #FFD700
  • Muted: #333333
• Typography:
  • Headings: Bebas Neue — All caps, wide letterspacing
  • Body: Roboto
  • Scale: 1.5 modular, 48/32/24/18/16
• Shape Language: Label and tag motifs, hazard stripes, exposed grid lines
• Layout: Structured with industrial framing, bold central elements, clear hierarchy
• Motion: Snappy transitions with marquees and tag flips

7. Signature Design Concept

The public entry features a full-screen dark background with a central HOLD TO TALK button in safety orange, accented with hazard stripes and UI elements styled as industrial labels. The design emphasizes a professional walkie-talkie aesthetic with bold typography and structured layout.

8. Interaction Model & Motion Direction

• Interaction Model: Static
• Motion Tempo: Expressive
• Hero Dimensionality: Flat
• Landing Hero Motion Brief: The central HOLD TO TALK button animates with rings indicating activity. Tag flip animations are used for notifications and status updates, maintaining a bold and industrial aesthetic.

9. Non-Functional Requirements

• Security: Implement encrypted communication, secure authentication, user permissions, and secure storage of user information. Handle microphone and location permissions appropriately.
• Performance: Ensure low latency in voice communication by separating it from normal application data.
• Scalability: Design the system to support future feature additions without major architectural changes.

10. Tech Stack

• Mobile Application: Flutter or React Native
• Voice Communication: WebRTC
• Backend: Node.js
• Database: PostgreSQL or Supabase
• AI Services: AI real-time voice API, speech-to-text, and text-to-speech services

11. Assumptions and Constraints

• The primary experience must be real-time walkie-talkie communication.
• The initial MVP scope includes authentication, channels, real-time push-to-talk communication, and the AI assistant.
• Voice communication must be handled separately from normal application data to maintain low latency.
• Location permission is requested only when the user enables location sharing.

12. Glossary

• AI Assistant: A feature that provides voice-based assistance, including translation and summarization.
• Channel: A virtual space where users can communicate via voice messages.
• Push-to-Talk: A communication method where users press a button to speak and release it to send the message.
• Emergency Mode: A feature that allows users to send urgent alerts and share their location with selected contacts.